Island



Jan. 27,4 1931. cjc. PLUME APPARATUS FOR TRANSMITTING HEAT QXL Filed Aug. l0, 1928 (ar/es/S/z/M u l N VENTOR ATTOR HEY Patented Jan. 27, 1931 UNITED STATES CHARLES C. PLUMB, OF PROVIDENCE, RHODE ISLAND APPARATUS FOR TBANSMITTING HEAT Application led August 10, 1928. Serial No. 298,744.

This invention relates to appara-tus for transmitting heat from a heating medium to an object or material to be heated, the general object of the invention being to provide a closed container in which is placed mineral salts, with means for heating the container to bring the salts to a molten state, said container having a coil therein and means for passing a non-coking oil through the coil and conveying the oil from the coil to the object or throughv the material to be heated whereby lthe object'or material will be heated to a high degree.

This invention'also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, refeience will be had to the accompanying drawing which is a diagrammatic View, partly in section, showing theA invention in use for heating material in a tank.

In the drawing, the numeral 1 indicates a closed container in which the mineral salts, indicated by the numeral 2, are placed, and in which is also arranged a coil 3, the lower part of which is immersed in the salts and a tank 4 forms an extension of one end of the container and contains a non-colring o il, as indicated by the numeral 5. The coil is provided with an extension 6 at one end which extends into the tank 5 to a point adjacent the bottom thereof. The other end of the coil is conected by a pipe 7 with a pump 8 which is driven from any suitable source through the belt and pulleys, shown gen- 4G erally at 9. An air pump 10 is also driven from the shafting which is connected with the pump 8 and suitable clutch means 11 arc provided for connecting each pump with the power means. The outlet of the pump S is i connected by the pipes 12 and 12 with a coil 13 which may be placed in the tank 14 of av tank car containing asphalt, though it will, of course, be understood that the invention 4 may be used for heating any other material besides asphalt or it Vmay be used for heating any desired object. The outlet of the coil i 13 is connected by the pipes 15 with the of the tank 5. y

Thus it will be seen that when the pump 8 is in operation, oil will be drawn yfrom the bottom of the tank 5 through ,the coil 3 and pipe 7 and forced through the pipes 12 and 12 into the coil 13 andthen the coil will return to the tank 5 through the pipes 15. -f Burners 16 are placed underV the container 1 and the tank 5 and pi es 17'connect these burners with a tank 18 willich contains a supply ofliquid fuel. An air tank 19 is laced over the tank 18 and pipes 20 connect t e air tank with the air pump 10, avbranch pipe21 connecting one of the-pipes 20 with the tank 18 so that the liquid fuel in said tank 18 is held 'under'pressure The tank 19 is connected by the ipes 22 with the discharge line 12 and 12 ci) the pump, so that the compressed air in the tank 19 can be used for forcing the oil from the coil 13 back into the tank 5 after theheating operation has been completed. f

A b ass line -23 connects thepipe 12 with one o 't e pipes 15 so that the oil can be circulated through the coil3 and the tank 5 while it is being heated to the proper degree before passing it through the coil 13. It will, of course, be understood that suitable valves, such as shown at 24, are placed in the pipe lines to properly control the flow of oil and air through the system, and safety valves 25 and pressure gauges 26 are also provided wherever necessary or desired.y Pyrometers or other suitable temperature indicating devices may also be placed wherever desired. f

From the foregoing it will. be seen that the heat from the burners will heat the salts in the container 1 and the oil in the tank 5. The heat will melt the salts so that they assume a liquid state and as the coil 3 is partly immersed in the liquid salts, the oil in the coil Will be highly heated and the valve 24 in' the by-pass 23 is opened and those in the pipes 12 and 15 closed so that the pump 8 will draw the oil through the coil 3 and force it through the by-pass 23 back into the tank 5 and the oil is thus circulated until it reaches the proper temperature. Then the valve in top the by-pass is closed and thel valves in the pipes 12 and 15 opened so that the highly heated oil Will pass through the coil 13 and return to the tank 5 through the pipes 15, and this circulation of the oil through the coil 13 is` continued until the material in the tank 14 is heated to a suflicient degree. Of course, during this operation7 the air pump furnishes compressed air into the fuel tank 18 so that fuel is supplied to the burners and after the operation has been completed, the Valves are manipulated so that compressed airrfrom the tank 19 can be forced through the coil 13 to force the air vtherefrom back into the tank 5.

With this invention, a uniformity of control ofthe heat transmitted is secured and it enables oils to be heated at temperatures close to their flash and fire points, las the use of the liquid salts assures a Very close regulation Aof, the temperature, Whereas any other method of heatingthe oil involves a dangerous condition because of the lack of uniform introduction of heat to the coil containing the oil.

As Will be seen, the mineral salts are used as the primary heating medium7 and the noncoking oilas ap-secondary heating medium.

It is thought from the foregoing description that the advantages and novel yfeatures Y of the invention Will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of theseveral parts, provided that such changes fall Within the scope of lthe appended claim.

What I claim is An apparatus of the class described comprising a container partly lled with mineral salts, a tankA containing oil, means for heating the container and tank7 a coil in the container and partly immersed in the liquid, one end of the coil extending into the tank to a point adjacent the bottom thereof, a pump connected With the other end of the coil for drawing the oil from the tank through the coil to the point of use and a return pipe for returning the oil to the tank.

In testimony whereof I affix my signature.

CHARLES C. PLUME. 

